How to capture image using webcam in C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using WinFormCharpWebCam;
namespace Camera_Sample
{
    public partial class Form1 : Form
    {
        WebCam webcam; //customized class created for handling the task of capturing image from Webcamera
        public Form1()
        {
            
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            webcam = new WebCam();
            webcam.InitializeWebCam(ref imgCam);
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            webcam.Start();

        }

        private void btnStop_Click(object sender, EventArgs e)
        {
            webcam.Stop();
        }

        private void imgPreview_Click(object sender, EventArgs e)
        {

        }

        private void btnContinue_Click(object sender, EventArgs e)
        {
            webcam.Continue();
        }

        private void btnClick_Click(object sender, EventArgs e)
        {
            imgPreview.Image = imgCam.Image;
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            SaveFileDialog sdialog = new SaveFileDialog();
            sdialog.FileName = "Image";// Default file name
            sdialog.DefaultExt = ".Jpg";// Default file extension
            sdialog.Filter = "Image (.jpg)|*.jpg"; // Filter files by extension

            // Show save file dialog box
            // Process save file dialog box results
            if (sdialog.ShowDialog() == DialogResult.OK)
            {
                // Save Image
                string filename = sdialog.FileName;
                FileStream fstream = new FileStream(filename, FileMode.Create);
                imgPreview.Image.Save(fstream, System.Drawing.Imaging.ImageFormat.Jpeg);
                fstream.Close();
            }
        }
    }
}

using System;
using System.IO;
using System.Text;
using WebCam_Capture;
using System.Collections.Generic;



namespace CSharpWebCam
{
    //Design by Dharma Iyer
    class WebCam
    {
        private WebCamCapture webcam;
        private System.Windows.Forms.PictureBox _FrameImage;
        private int FrameNumber = 30;
        public void InitializeWebCam(ref System.Windows.Forms.PictureBox ImageControl)
        {
            webcam = new WebCamCapture();
            webcam.FrameNumber = ((ulong)(0ul));
            webcam.TimeToCapture_milliseconds = FrameNumber;
            webcam.ImageCaptured += new WebCamCapture.WebCamEventHandler(webcam_ImageCaptured);
            _FrameImage = ImageControl;
        }

        void webcam_ImageCaptured(object source, WebcamEventArgs e)
        {
            _FrameImage.Image = e.WebCamImage;
        }

        public void Start()
        {
            webcam.TimeToCapture_milliseconds = FrameNumber;
            webcam.Start(0);
        }

        public void Stop()
        {
            webcam.Stop();
        }

        public void Continue()
        {
            // change the capture time frame
            webcam.TimeToCapture_milliseconds = FrameNumber;

            // resume the video capture from the stop
            webcam.Start(this.webcam.FrameNumber);
        }

        public void ResolutionSetting()
        {
            webcam.Config();
        }

        public void AdvanceSetting()
        {
            webcam.Config2();
        }


        internal void InitializeWebCam(System.Windows.Forms.PictureBox imgCam)
        {
            throw new NotImplementedException();
        }
    }
}